"世界上充满了面带友好的怪物。"

你不能让过去的错误阻碍你未来的进步。

The real problem is not whether machines think but whether men do.

唯一存在的限制是你脑海中的限制。

Trade between two countries can be mutually beneficial, even if one of them is less efficient in the production of all commodities.

追求数学知识是一段永无止境的旅程。